US COVID Cases Likely Undercounted by Up to 60%, New Model Shows

As many as 60% of COVID-19 cases in the United States likely have gone undetected, according to new research published online in the Proceedings of the National Academy of Sciences. Adrian Raftery, PhD, professor of sociology and statistics, along with statistics doctoral student Nicholas Irons, both at the University of Washington in Seattle, […]

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Disparities in COVID-19 Vaccination Coverage Among Health Care Personnel Working in Long-Term Care Facilities, by Job Category, National Healthcare Safety Network — United States, March 2021

Summary What is already known about this topic? Residents of long-term care facilities (LTCFs) and health care personnel (HCP) who work in these facilities were prioritized for early COVID-19 vaccination. Achieving high coverage in this setting is critical to preventing additional outbreaks. What is added by this report? During March […]

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Unraveling the Mysterious Mutations That Make Delta the Most , COVID Virus Yet

Upon first inspection, the mutations in the highly contagious delta covid variant don’t look that worrisome. For starters, delta has fewer genetic changes than earlier versions of the coronavirus. “When people saw that the epidemic in India was driven by delta, they did not suspect it would be so bad […]

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Diagnostic accuracy of rapid antigen tests in asymptomatic and presymptomatic close contacts of individuals with confirmed SARS-CoV-2 infection: cross sectional study

Abstract Objective To assess the diagnostic test accuracy of two rapid antigen tests in asymptomatic and presymptomatic close contacts of people with SARS-CoV-2 infection on day 5 after exposure. Design Prospective cross sectional study. Setting Four public health service covid-19 test sites in the Netherlands. Participants 4274 consecutively included close contacts (identified through test-and-trace […]

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